Every part on the bike that rotates or pivots needs a bearing. Most of these bearings are cartridge sealed bearings that can be easily replaced when worn out or broken. But in the bicycle industry there are many different types and dimensions of bearings used, for which you need to find exactly the same type/dimension to replace it and fix your bicycle.
Bearings are used by the billions all over the world in any type of industry, for which different specs and tolerances have been developed. Most industries rely on world famous bearing makers like SKF and NSK. Within the bicycle industry the bearings in new bikes are sourced by the component makers for hubs, bottom brackets, headsets, pedals and the suspension frame makers. Within the bicycle industry there are 4 main bearing makers that supply more than 90% of all bearings to these component makers.
Under its UNION brand, Marwi set up a cooperation with these 4 bearing manufacturers to offer a complete assortment of almost all bearings that you can find in any bike. And these are the original bearings used by the bicycle brand manufacturers.
UNION sealed bearings are made according to ABEC-3 specs, the common precision within the bicycle industry. Both the races (rings) and balls are made of CrMO steel hardened upto HRA 66. All cartridge bearings are completed with two rubber seals (2RS), similar to LLB, that create a light (slidy) contact. Due to the usage of the high-end Multemp SRL grease a low noise and long life is guaranteed.
On top of the standard cartridge bearings we also offer a wide range of ceramic bearings for hub/wheel and bottom bracket made according to ABEC-5 specs. The balls made from Si3N4 Silicon Nitride are hardened upto HRA 89 with special grease Multemp PS2.
All bearings for MTB, Mountain, CX, Road and other bicycles you can find here.
To find bearing easy also browse categories: Hub/Wheel bearings, Bottom Bracket bearings, Headset bearings, Pedal bearings, Pulley bearings, Frame/Suspension pivot bearings, Cartridge bearings, Ceramic bearings, MAX full ball bearings, Max double row bearings.
If have questions or need assistance feel free to contact us.